Below are the potential energy profiles for three reactions. Which of the following statements is true?

The activation energy of reaction 3 is thrice the activation energy of reaction 1.

For reaction 2, ΔH_rxn = –65 kJ/mol.

The activation energy of the reverse reaction for reaction 3 is E_a2 = +15 kJ/mol.

The more exothermic the reaction, the faster the reaction would be.

Exothermic reactions are always faster than endothermic reactions.